Explorations of the Universe with the BABAR and LSST Experiments

粒子物理学和宇宙学领域已经密不可分地交织在一起。基于加速器的实验、矿山中的探测器和望远镜都是探索暗物质性质等基本问题所必需的。由原理调查员Patricia Burchat领导的斯坦福团队将完成对斯坦福直线加速器中心高生产率BABAR实验的投资，并通过拟议的大型天气观测望远镜在宇宙学方面建立新的努力。在BABAR实验中，目标是在2008财年结束时，将目前的数据样本增加一倍以上，完成其九年计划。斯坦福集团将为SVT和SVT辐射监测系统的维护和运营做出贡献。该小组的成员将完成正在进行的在稀有或被禁止的牛顿和魅力衰变中寻找新物理的工作，以及一系列涉及魅力重子的多样化分析。该小组还启动了一项涉及D混合的新分析工作，并将对完整的数据样本进行B-Rho pi的最终随时间变化的Dalitz图分析，以提取CKM角α。大型天文观测望远镜是第一个从头开始设计的地面望远镜，目的是解决充分利用弱引力透镜作为宇宙学探测器所需的对系统不确定性的严格要求。LSST还将通过研究大尺度结构的增长、重子声振荡和Ia型超新星来解决宇宙学问题。斯坦福大学小组将加入LSST项目合作，并将在受益于粒子物理学家经验并帮助理解和减少潜在系统不确定性的领域做出贡献：开发详细的模拟、利用现有数据集研究算法以及设计和建造校准系统。该计划的更广泛影响有几个焦点。PI将继续努力，通过教程和研讨会将实验粒子物理学家纳入LSST项目。斯坦福大学小组的成员一直非常参与让高中教师和学生(包括那些传统上在物理学中代表性不足的人)参与基础研究的项目。PI领导了开发新的本科专业的努力，以增加接受物理教育的学生队伍。

The fields of particle physics and cosmology have become inextricably intertwined. Accelerator based experiments, detectors in mines, and telescopes are all needed and used to explore fundamental questions such as the nature of dark matter. The Stanford group led by Principle Investigator Patricia Burchat will complete its investment in the highly productive BaBar experiment at the Stanford Linear Accelerator Center and build a new effort in cosmology through the proposed Large Synoptic Survey Telescope. On the BaBar experiment the goal is to more than double the current data sample by the time the experiment completes its nine-year program at the end of FY2008. The Stanford group will contribute to the maintenance and operation of the SVT and the SVT radiation monitoring system. Members of the group will complete ongoing searches for new physics in rare or forbidden tau and charm decays, and a diverse set of analyses involving charmed baryons. The group is also initiating a new analysis effort involving D mixing and will conduct the final time-dependent Dalitz-plot analysis of B - rho pi on the complete data sample, to extract the CKM angle alpha. The Large Synoptic Survey Telescope is the first ground-based telescope being designed from scratch to address the severe demands on systematic uncertainties needed to fully exploit weak gravitational lensing as a cosmological probe. The LSST will also address cosmological questions through studies of the growth of large scale structure, baryon acoustic oscillations, and Type Ia supernovae. The Stanford group is joining the LSST project collaboration and will contribute to areas that benefit from the experience of particle physicists and aid in the understanding and reduction of potential systematic uncertainties: the development of a detailed simulation, the study of algorithms with existing data sets, and the design and construction of calibration systems. The broader impacts of the program have several foci. The PI will continue her efforts to integrate experimental particle physicists into the LSST project through tutorials and workshops. Members of the Stanford group have been very involved in programs that involve high school teachers and students (including those traditionally under-represented in physics) in basic research. The PI has led efforts to develop new undergraduate majors that increase the cohort of students who receive an education in physics.